Nut-lock.



H. T. CRAVEN.

NUT LOOK.

APPLICATION FILED JUNE 4, 1913.

Patented Aug. 25;, 191%..

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on Q name stories FFXGEO HENRY TOWNSON CRAVEN, 01 VINELAND, NEW JERSEY.

NUT-LGGK ll,ll8,832.

Specification of Letters Patent.

Application filed June 4,1913. Serial No. mien:

To all whom it may concern:

Be it known that I, HENRY T. CRAVEN,

a subject of the King of England, resident of Vineland, in the county ofCumberland and State of New Jersey, have made a certain new and usefulInvention in Nutinvention, re erence being had 'tothe ac-- companyingdrawings, and to letters or figures of reference marked. thereon, whichform a part of this specification- .lFigure 1 is a side view of-theinvention. Fig. 2 is a Sectionon the line 2-2, Fig. 1.

'lFig. 3 is a central longitudinal section of the invention, showing amodification thereof. Fig. 4 is a view similar to Fig. 2, showing amodification wherein the transverse groove is extended out at one sideonly of the radial groove, said radial groove being made shorter. Fig. 5includes a deta1l frag-. mentary plan view and a detail cross sectionalview of the key. Fig. 6 is a detail sectional view of the nut, taken onthe line 6-43, Fig. 2, showing the cam wall.

The invention has relation to lock-nuts, and it consistsin the novelconstruction and combinations of parts, as hereinafter set forth.

In'th'e accompanying drawings Illustratiiig the invention, the numeral2, indicates a bolt and 3, its threadedend portion, in connection withwhich is a lock-nut 4. The threaded end portion of the bolt is providedwith one or more longitud nal grooves 55, such grooves being notuncommon in bolts ,to be used in connection with lock-nuts of differentkinds. The lock-nut 4, is of special character in having formed in itsbase, and communicating with the opening of its threaded aperture,several radial grooves 63, each radial groove intersecting a transversegroove 7. The inner portion 8, of theradi'al groove is provided withwalls 9, which divcrge from the bolt hole to the transverse groove, andthe inner channel or groove 8, is

wider at this point than the outer portion of the groove 6, the walls ofwhich are substantially parallel. This construction isdesigned toprovide angular abutments or corner bearings 10, of the outer walls ofthe transverse channel, such abiit inents projecting within the angularopening or span of the inner and wider portion '8, of the inter-' sectng radial groove.v Each intersecting radial groove s designed to be asdeep asits outer portion is wide, and its bottom is made transverselyconcave to provide a, continuous radial hear ng or cam wall 6' intowhich merge the d verging walls and corner shoulders of the innerportion of the groove.

In connection with theloolt and nut is employed a lockin :key or pin 12,which is usually of flat $0 lateral spring tongue 13, which extendsbackfrom the. end of the key; And the length of the key from'the inner endto the outer end of the tongue 13,'is designed to be equal ftO. thedistance between thebottom oi the groove in the bolt to the cornerbearing 10, of the nut.

In operation, the nut is turned on the bolt until its base is brought incontact with the work. The key is inserted in one of the radial groovesof the nut which is turned a little forward or back until the end of thekey engages the groove ofthe bolt. When this occurs, the spring tongueof the key Patented nag. e5, 1914i.

rm and provided with a escaping from the narrower outer portion of thegroove in the base of the nut, will engage the corner bearing 10, ofthe,nut,-and prevent. any movement of the nut on the bolt. lnorder todisconnect the nut from the bolt, it is only necessary to turn thekeyirrooves of thekind hereinbefore described.

The spring keys, being placed between the nuts in the correspondinggrooves with their inner ends at the bolt thread, can be turned on thebolt with the nuts, until the latter are turned home, when the keys canbe pressed in to lock both nut. In this modification the heads 12, ofthe keys are usually bent in opposite directions at right angles, tofacilitate turning of the keys for release. I claim: 1. A loclrmut for alongitudinally grooved assa e havin an outer ortion rovided,

with parallel walls andan inner portion provided with an oblique walland a transverse shoulder between said oblique wall and one of saidparallel walls.

3. In a nut lock, he combination with'a longitudinally grooved bolt, ofa nut having threaded engagement with said bolt and having a radialpassage, said passage having an outer portion provided with parallelwalls and an mner portion provided with an oblique wall and a transverseshoulder between said oblique wall and one of said parallel walls, and akey having engagement with said passage and the bolt groove and wall forrelease.

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provided with an inner spring, end engagement with said shoulder.

4. In a nut lock, the combination with a longitudinally grooved bolt, ofa nut having threaded engagement with said bolt and having a radialpassage, said passage having an outer portion provided with parallelwalls and an inner portion provided with an oblique wall, a transverseshoulder between said oblique Wall and one of said parallel walls, and acam wall, and a key having an outer portion in close engagement withsaid parallel walls and an inner spring end in' engagement with saidshoulder, said key being capable of being turned to bring said springend in engagement with said cam In testimony whereof I affix mysignature, in presence of two witnesses.

HENRY TOWNSON CRAVEN.

Witnesses:

BENJAMIN S'rEvENs,

WILLIAM E. Rooms.

